Re: TWL4030 keypad timeout interrupt

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On Wed, May 14, 2008 at 10:38:09AM +0530, ext Girish wrote:
> 
>  
> >
> >
> >On Tue, 13 May 2008 16:54:17 +0300, Felipe Balbi 
> ><felipe.balbi@xxxxxxxxx>
> >wrote:
> >> Hi all,
> >> 
> >> I noted whenever we release a key in omap-twl4030.c driver it 
> >> generates two interrupts: one for release event and one for 
> >a timeout event.
> >> 
> >> Is that expected or is that a bug somewhere in the driver ?
> >> 
> >> It's easily noted by cat /proc/interrupts ;-)
> >
> >Replying to myself as I found some more clues.
> >
> >By checking the code I could see that only rising edge of 
> >timeout interrupt is being enabled. Also timeout register is 
> >at 0xd6, but code is writing 0x04...
> >
> 
> No, the code is writing to 0x00D2 + 0x04 (the t2keypad base address: 0x00D2). 

Ok, good :-)
thanks

> 
> >So if i read it correctly, we might have 0 set as our timeout.
> >
> >which might explain why we only see the timeout interrupt when 
> >releasing the key.
> >
> >Am I right ?
> 
> Well, the timeout is here to help the controller come out of hangs, if any. 

But is it possible that whenever we release a key we get a timeout? I
think something is wrong there.

-- 
	- Balbi
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